Fan guard mounting



Feb. 28, 1950 H. VIEWEGH FAN GUARD MOUNTING 2 Sheets-Sheet 1 Filed March 7, 1945 Feb. 28, 1950 J. H. VIEWEGH 2,498,968

FAN GUARD MOUNTING Filed March 7, 1945 2 Sheets-Sheet 2 Patented Feb. 28,, 1950 OFFICE :GUA'RDV MOUNTING John H.viewe ujnaimasouama i Appnmaon uamn 7 1945, Serial No. 531,359

r This invention relates to-a guard fohrotary fans and has for a primary object the provision in a structure for adapting it to a wide range of fan blade sizes and fan driving motor sizes. A further important object of the. invention. is to so form the structure that. it maybe stored and shipped in a nested arrangementfin order to materially reduce the overall dimenfon s when so nested. g

These and. other important objects and advantages of the invention will become apparent to those versed in the art in the following description of one particular form of the invention asillustrated in the accompanying drawings,

which Fig. 1 is a view in front elevation of thestructure embodying the invention as applied to a motor driven fan; 7 Fig. 2, a view in end elevation; r

Fig. 3, a view in transverse section onthe-line 3-3 on an enlarged scale;

Fig. 4, a view of the fan guard in rear elevation apart from the motor;

Fig. 5, a view in rear elevation of, the front section of the guard;

Fig. 6, a view in partial section on the line 6-6 in Fig. 4 on an enlarged scale; and

radiates a plurality of bars or wires; I2, herein shown as twelve in number, each of which wires I2 has its outer end curved around' rearwardly to join'a maximum diameter ring]; spaced in a plane rearwardly of the plane or the small center and forwardly disposed ring I I, the planes .of both rings being parallel one to the other.

Located on the curves of the wires 12 is a third ring I4. A fourth ring I smaller -'in diameter than the ring [4 (ring I4 being smaller in diameter than the ring 13) is located on the straight portions of the wires I2 substantially at the positions thereof from which the wire starts curving rearwardly. All ofthese parts so far described are interconnected one with the other by any suitable means; such as'by arc welding or the like.

The rear portion of the guard generally designated by the numeral has a rearwardly disposed ring Ifi'with a diameter substantially the same as that of the ring I5 in the forwardsececl i s. (o1. zen-+2751 her 24 in each instance with its bar 2I.

tion. Fixed to and extending around forwardly from this ring Him a plurality of bars or wires I], herein shown as twelve in number. Each of" the [wires II curves around forwardly with substantially the same degree 'of curvature as appears in the outer end portions of the wires i2 of the front section; I'll. At the extreme forward ends of these wires IT is fixed an outer and forward ring "I8 having the same diameter as the ring I3 in the section III. The wires H are further held in spaced apart alignment by an intermediate ring I 9 secured. to the outer sides of the curved portions of those Wires IT. This ring I9 has in the present showing the same diameter as the ring i4 of the front section Ill.

Bars 2!, herein shown as four in number, are hinged by outer ends to the ring I6 by any suitable means, herein shown, Figs. 6 and 7, as by bending spaced apart fingers 22 and 23. around the ring Hi. In each instance, the bar H is lo- 'cated to-have its fingers 22 and 23 straddle a wire II so that the bar will be fixed in position circumferentially of the ring I6.

Over the outer end of each bar 2| is telescoped a. flattened tubular member 24 having an eye 25 in its outer end through which a bolt or cap screw 26, Fig. 1, may be passed into the drive motor 21. That is, by securing the tubular members 24 through their eyes to the motor 21, the rear guard section 20 is fixed in position on the motor 21 to be located axially thereof by reason of. the sliding engagement of the mem- Thus the section 20 may be applied to wide ranges of sizes of drive motors 21 by reason of the adjustability of the engaging members 24 on the hinged bars 2I. The hinging of these bars permits the section 20 to be carried forwardly or rearwardly in respect to the motor?! depending upon the fixed angle of the portion against which the members 24 will bear. In some instances (not shown) these bars 2| may extend directly rearwardly from the section 20 for motor attachment, or attachment to some supporting member where the motor is at a remote position.

The rear section .20 can be mounted directly on the motor 21 without having to remove the fan 28 from its mounting on the motor'since the diameter of the ring I6 is sufiicient to permit the manipulating of the section .20 thereover. The front section II] may then be applied and secured to the rear section 20 by bringing the section I'D up to the section 20 to have the ring l3 come into contact and match against the ring I8. In this position, an encircling band 29, U-shape in cross 3 section, Fig. 3, is brought around both of these rings l3 and I8 from their outer sides and this band pulled together end to end by any suitable means, such as by the bolt 30 passing through the respective upturned ears 3| and 32 that are fixed on the outer sides of the end portions of the band 29, and a nut 33 drawn up on the bolt 30 to effect the pulling snugly of the band 29 around those rings. Since the band 29 is U-shape in cross section,'the downturned side flanges of the band prevent lateral displacement of the rings l3 and IS in relation to each other, as well as vertical displacement by reason of the band being on the I and across the forward side of the'fan 28 and the.

guard so assembled formsa rigid unitary structure.

For storage or shipping'purposes, the front 7 section 10 may be reversed to have its forward side dropped down inside the rear section (or the rear section placed inside the front section) to nest.one with the other so asto reduce the overall thickness of the two units. This is of considerable importance particularly where the guards are of comparatively large diameter and thickness for large fans.v

It is thus to be seen that a more efficient and simple form of structure is provided and one that is adapted for use in a wide range of fan and motor sizes and particularly with different forms of motor housings and bolt receiving patterns, and while I have illustrated and described the invention in the one particular form, it is not intended that the invention be limited to that precise form beyond the limitations as may be imposed in the following claims, since it is obvious that mechanical changes may be. made without departing from the spirit of the invention.

I claim: l

1. A fan guard mounting comprising at least three bars; a fan guard; means for securing inner ends of said bars to said guard in spaced relation, circumferentially therearound; tubes slidingly telescoping over outer end portions of said bars; and mounting means on the outer ends of said tubes.

2. For mounting a fan guard on a motor, a fan guard; a plurality of bars exceeding two in number hinged by outer ends to said guard in a common circle and spaced one from the other circurnferentially" therearound; a member slidingly 'telescoping-with -each or said bars as an adjustable extension thereof; and motor engaging means on the outer end of each of said telescoping members; whereby said telescoping members may be individually secured by their outer ends to said motor either on an end or on the circumferential surface thereof and axially align the "guard with the f an driven by the motor in the The following referencesare of record in the file of this patent:-

, UNITED- s'iA'l'jEs PATENTS Number H 7 Name Date 782,816 Becker Feb. 21, 1905 1,355,145 Hoffine; Oct. 12, 1920 1,578,361 -Philp Mar. 30, 1926 1,784,516 Fairbanks Dec. 9, 1930 1,846,634 Fifils Feb. 23, 1932 1,871,625 Lufl Aug. 16, 1932 2,010,804 Baker Aug. 13,1935 2,017,431 Anderson et al Oct. 15, 1935 2,258,325 Hess et al Oct. 7, 1941 2,345,516 Weber Mar; 28,- 1944 2,389,824 Smith Nov. 27, 1945 2,421,833

.Cronstedt et a1. June 10, 1947 

